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developed a citywide water supply system. sullivan: in 1630, boston was basically three mountains, there were very steep hills. waste would run down quickly and dump into the harbor. and the tide would carry most of it away. well, this worked well for a while. the problem was, as boston wanted to expand, it started filling in the mudflats. the water could come rushing down the hill, it would hit the flat area and slow down. at high tide, it couldn't get out at all. it got so bad that the city took over, 'cause the city has a responsibility to protect its citizens. boston built the first modern sewer system in the united states. ours was completed between 1877 and 1884. with this wonderful new sewer system, we were taking our filth and moving it out to the ocean. of course, all of this was untreated. in the 1960s, we were still pumping all of our sewage out to moon island, untreated. we would get swimmers here, never knowing, in the middle of summer, why you would have a cold. well, we were swimming in diluted sewage. melosi: the major way to deal with pollution, at least until ear
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